Overview

Cat® transfer switches are designed for a variety of standby power applications. They provide flexibility, reliability and value in a compact package. The open and delayed transition contactor-based Automatic Transfer Switch (ATS) provides fully functioning transfer in Applications where a momentary loss of power is acceptable during transfer and retransfers between normal and emergency power supply. The closed transition contactor-based ATS is designed to Meet application requirements where emergency back up power is required with no momentary loss of power by connecting both sources before the transfer occurs. Closed transition also permits periodic testing of the emergency power source without interrupting power to the loads.

ATC Contactor-Based Automatic Transfer Switch Standard Equipment

Contact Composition

Caterpillar utilizes silver composition contacts designed to meet the stringent requirements of UL 1008. All contactors are designed so that the contacts can be visually inspected without major disassembly and are protected by arcing contacts.

Controls and Wiring

All controls relays and industrial grade relays are totally encapsulated to minimize exposure to dust and dirt. Lugs are 90º rated and all control wire is #16 AWG, type XLPE with a 125º temperature rating.

Enclosure

Durable powder-coated steel NEMA 1, 3R or 12 enclosures with three door hinges to ensure proper support of the door and door mounted devices. The hinges have removable hinge pins to facilitate door removal for easy wall mounting or service and are supplied with pad-lockable latches.

ATC Contactor-Based Automatic Transfer Switch Optional Equipment

Available Options

2- or 4-position test switch

Multi-meter options available

Delayed transition or closed transition

Selectable automatic or non-automatic operation

Space heaters

Surge suppression

Remote communications

Load shed from emergency

Controller availability: ATC-100, ATC-300+,and ATC-800

Field selectable, multi ratio, control voltage transformer 50/60 Hz

Optional Delayed Transition includes:

Time delay neutral

Pre-transfer signal with 1 N.O. and 1 N.C. contacts

Cat® Dealer Service

Buy any piece of Cat® equipment and also get the full support and commitment of your local Cat Dealer.